<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./js/vue.js"></script>
</head>
<body>

    <div id="app">


        <input type="number" v-model="score">
        <h3 v-if="score >= 90">优秀</h3>
        <h3 v-else-if="score >= 70">良好</h3>
        <h3 v-else-if="score >= 60">及格</h3>
        <h3 v-else>no  no  no</h3>

     
    </div>
    
</body>

<script>



    new Vue({
        el:"#app",
        data:{
            score:Math.round(Math.random()*100),

        },
        methods:{
    
        }
    })
</script>
</html>